JPH0635799U - Multi-tube evaporator - Google Patents

Abstract

(57) [Summary] [Purpose] Determine the orientation of the long and short sides of the rectangle formed by the tips of the fins according to the longitudinal and lateral dimensions of the evaporator installation space. Freely determine the front-back and left-right dimensions of the entire evaporator. [Structure] Vertical evaporation tube with multiple radial fins 31, 32, 33
11 are arranged in rows extending in the front, back, left and right. A line that sequentially connects the tips of all the fins 31, 32, 33 of each evaporation tube 11 is a rectangle R when viewed in the axial direction of the evaporation tube.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-tube evaporator used for evaporating liquid oxygen, for example.

[0002]

[Prior art]

 In this type of evaporator, as shown in FIGS. 6 and 7, a plurality of vertical finned evaporation pipes 41 with radial fins 42 are arranged in rows extending in the front, rear, left and right directions, and all fins of each evaporation pipe 41 are arranged. It is known that the line connecting the tips of 42 in sequence is a square S whose one side is I when viewed from the axial direction of the evaporation tube (Japanese Utility Model Publication No. 58-12057).

[0003]

[Problems to be solved by the device]

 In this type of evaporator, the number of rows in the front-rear direction and the number of rows in the left-right direction of the evaporation pipe 41 are determined by the performance required by the evaporator. Then, if the row pitch P is constant, the dimension T1 in the front-rear direction and the dimension T2 in the left-right direction of the entire evaporator are naturally determined. There is no problem if the evaporator is installed in a space wider than the dimensions T1 and T2 determined in this way. However, if such an installation space cannot be secured, install an evaporator with the required performance. I couldn't.

An object of the present invention is to provide a multi-tube evaporator in which the front, rear, left and right dimensions of the entire evaporator can be freely determined according to the installation space of the evaporator.

[0005]

[Means for Solving the Problems]

 The multitubular evaporator according to the present invention is a multitubular evaporator in which a plurality of vertical finned vertical evaporation pipes with radial fins are arranged in rows in the front, rear, left and right, and the tips of all the fins of each evaporation pipe are sequentially connected. The feature is that the line is rectangular when viewed from the axial direction of the evaporation tube.

[0006]

[Action]

 In the multi-tube evaporator according to the present invention, the line connecting the tips of all the fins of each evaporation tube in sequence is a rectangle when viewed from the axial direction of the evaporation tube. Therefore, the long side of the rectangular shape formed by the tips of the fins and It is possible to determine the orientation of the short side according to the front-back and left-right dimensions of the evaporator installation space.

[0007]

【Example】

 An embodiment of this invention will be described below with reference to FIGS.

In this specification, “front and rear” refers to the flow upstream side on the front side (left side in FIGS. 1 and 2) and the opposite side with respect to the flow direction (arrow A) of the warmed gas flowing in the evaporator. Is referred to as the rear, and left and right means the direction orthogonal to the front and rear.

As shown in FIGS. 1 and 2, the evaporator is provided with a plurality of vertical aluminum extrusion pipes 11 made of aluminum extruded material and arranged in rows extending in the front, rear, left and right directions.

The evaporating pipes 11 in the front row, the last row, and the left and right ends are connected and fixed by upper and lower frames 12 and 13 at the respective upper and lower ends. Further, the adjacent ones of the evaporating tubes 11 in the front and rear rows are the front and rear direction joint plates 14, and the adjacent ones of the evaporating tubes 11 in the left and right rows are the left and right direction joint plates 15 respectively. Are linked in.

The evaporating pipes 11 in each row extending in the front-rear direction are adjacent to each other, and are vertically and alternately connected by U-shaped pipes 21 to form a meandering passage as a whole. An inlet header pipe 22 is provided at the lower end of the frontmost evaporation pipe 11, and an inlet pipe 23 is provided therein. An outlet header pipe 24 is provided at the lower end of the evaporation pipe 11 in the last row, and an outlet pipe 25 is provided on this.

As shown in detail in FIG. 3, on the outer surface of the evaporation tube 11, three fins of high, middle and low types having different heights extending in the length direction of the evaporation tube 11, eight fins 31, 32, 33 are provided. It is provided radially. In FIG. 3, when the tips of the eight fins are sequentially connected, a rectangle R having a long side M and a short side N and having two diagonal lines D intersecting at the axial center of the evaporation tube 11 is drawn. Of the three types of fins 31, 32, 33, the high fins 31 are on the diagonal line D, and the middle and short fins 32, 33 are in the middle of the long fins 31 adjacent to each other. From the position that divides the outer circumference of the container 11 into four equal parts, they are of the same height and rise in opposite directions. It is preferable that the ratio M / N of the long side M and the short side N of the rectangular shape is 1.5 to 2.0.

As shown in FIG. 4, all the evaporation tubes 11 are arranged such that the long side M of the rectangle R formed by the fin tips faces the front-rear direction and the short side N faces the left-right direction. The widths of the front-rear direction joint plate 14 and the left-right direction joint plate 15 are equal to each other. Therefore, if the pitch in the front-rear direction of the evaporation tube 11 is P1 and the pitch in the left-right direction is P2, then P1> P2.

As for the surface area of the fins 31, 32, 33 of the evaporation tube 11 of the present invention shown in FIG. 4, the fin 42 of the conventional evaporation tube described at the beginning, that is, the fin 42 in which the line S connecting the tips is square If the surface area of the rectangle R is equal to the surface area of the square R, the relationship between the long side M and the short side N of the rectangle R and the side I of the square is M> I> N. The relationship between the pitch P1 in the front-rear direction and the pitch P2 in the left-right direction of the evaporation tube 11 of the present invention and the pitch P of the conventional evaporation tube 42 is P1> P> P2. Therefore, when the evaporation pipe 11 of the present invention is used, as compared with the case where the conventional evaporation pipe 42 is used, the dimension L1 in the front-rear direction of the entire evaporator becomes large, but the dimension L2 in the left-right direction becomes small.

On the contrary, as shown in FIG. 5, when the long side M of the rectangle R is oriented in the left-right direction and the short side N is oriented in the front-rear direction, the size relationship between the dimensions L1 and L2 is reversed. Become.

[0016]

[Effect of device]

 According to this invention, it is possible to determine the orientation of the long side and the short side of the rectangle formed by the fin tips in accordance with the dimensions of the evaporator installation space in the front-rear direction and the left-right direction. According to the above, the front, rear, left and right dimensions of the entire evaporator can be freely determined.

[Brief description of drawings]

FIG. 1 is a plan view of an evaporator showing an embodiment of the present invention.

FIG. 2 is a side view of the evaporator.

FIG. 3 is a cross-sectional view of an evaporation pipe of the evaporator.

FIG. 4 is an explanatory diagram showing a relationship such as dimensions of the evaporator.

FIG. 5 is an explanatory diagram corresponding to FIG. 4 showing another embodiment.

FIG. 6 is a cross-sectional view of an evaporation tube showing a conventional example.

FIG. 7 is an explanatory diagram corresponding to FIG. 4 showing a conventional example.

[Explanation of symbols]

 11 Evaporation tube 31, 32, 33 fins R rectangle

Claims (1)

[Scope of utility model registration request] 1. A multitubular evaporator in which a plurality of vertical fin tubes with radial fins 31, 32, and 33 are arranged in rows extending in the front, rear, left, and right directions. , 32, 33 is a multi-tube evaporator characterized in that a line R sequentially connecting the tips of the tubes is made rectangular when viewed from the axial direction of the evaporation tube.